diff --git a/api/current.txt b/api/current.txt
index d9b51229bcc1f..1e35b60d16857 100755
--- a/api/current.txt
+++ b/api/current.txt
@@ -42558,7 +42558,7 @@ package android.telephony {
   public class MbmsGroupCallSession implements java.lang.AutoCloseable {
     method public void close();
     method @Nullable public static android.telephony.MbmsGroupCallSession create(@NonNull android.content.Context, int, @NonNull java.util.concurrent.Executor, @NonNull android.telephony.mbms.MbmsGroupCallSessionCallback);
-    method public static android.telephony.MbmsGroupCallSession create(@NonNull android.content.Context, @NonNull java.util.concurrent.Executor, @NonNull android.telephony.mbms.MbmsGroupCallSessionCallback);
+    method @Nullable public static android.telephony.MbmsGroupCallSession create(@NonNull android.content.Context, @NonNull java.util.concurrent.Executor, @NonNull android.telephony.mbms.MbmsGroupCallSessionCallback);
     method @Nullable public android.telephony.mbms.GroupCall startGroupCall(long, @NonNull java.util.List<java.lang.Integer>, @NonNull java.util.List<java.lang.Integer>, @NonNull java.util.concurrent.Executor, @NonNull android.telephony.mbms.GroupCallCallback);
   }
 
@@ -42917,9 +42917,9 @@ package android.telephony {
     method public String getIccId();
     method public int getIconTint();
     method @Deprecated public int getMcc();
-    method public String getMccString();
+    method @Nullable public String getMccString();
     method @Deprecated public int getMnc();
-    method public String getMncString();
+    method @Nullable public String getMncString();
     method public String getNumber();
     method public int getSimSlotIndex();
     method public int getSubscriptionId();
diff --git a/telephony/java/android/telephony/MbmsGroupCallSession.java b/telephony/java/android/telephony/MbmsGroupCallSession.java
index 269cda13bd933..f1be31fa5477c 100644
--- a/telephony/java/android/telephony/MbmsGroupCallSession.java
+++ b/telephony/java/android/telephony/MbmsGroupCallSession.java
@@ -141,7 +141,7 @@ public class MbmsGroupCallSession implements AutoCloseable {
      * Create a new {@link MbmsGroupCallSession} using the system default data subscription ID.
      * See {@link #create(Context, int, Executor, MbmsGroupCallSessionCallback)}.
      */
-    public static MbmsGroupCallSession create(@NonNull Context context,
+    public static @Nullable MbmsGroupCallSession create(@NonNull Context context,
             @NonNull Executor executor, @NonNull MbmsGroupCallSessionCallback callback) {
         return create(context, SubscriptionManager.getDefaultSubscriptionId(), executor, callback);
     }
diff --git a/telephony/java/android/telephony/SubscriptionInfo.java b/telephony/java/android/telephony/SubscriptionInfo.java
index 443f90844c50b..58f12e2c427af 100644
--- a/telephony/java/android/telephony/SubscriptionInfo.java
+++ b/telephony/java/android/telephony/SubscriptionInfo.java
@@ -425,14 +425,14 @@ public class SubscriptionInfo implements Parcelable {
     /**
      * @return The MCC, as a string.
      */
-    public String getMccString() {
+    public @Nullable String getMccString() {
         return this.mMcc;
     }
 
     /**
      * @return The MNC, as a string.
      */
-    public String getMncString() {
+    public @Nullable String getMncString() {
         return this.mMnc;
     }